Diaphragm-pump.



PATENTED APR. 23, 1907.

G. J. ALTHAM. DIAPHRAGM'PUMP.

APPLIOATION FILED JULY 17. 1905.

\ARXLM UNITED STATES PATENT QFFICE.

GEORGE JOHN ALTHAM, or SWANSEA, MASSACHUSETTS, ASSIGNOR To AERo I ANDMARINE MOTOR COMPANY, or BOSTON, MASSACHUSETTS, A R- PORATION OFMASSACHUSETTS.

DIA HRAGM-Pomp.

Specification of Letters Patent.

Patented April 23, 1907.

. Application filed July 17,1905 SerialNo. 269.914.

I To all whom it may concern:

- which the following is a specification.

, and whic My invention relates to diaphragm pumps, and it has for itsgeneral object the provision of a pum which is simple in construction,When combined with an internal combustion motor, maybe operated mostsuccessfully, and with a very small amount of power, for continuouslypumping water,

for example through the water jacket of the cylinder of the motor, forthe pur se of coolin the cylinder.

igure 1 1s a vertlcal section Showin my invention when used inconnection wit internal combustidn motor.

In the drawings illustrating the principle of my invention, and the bestmode now known to me of embodying that principle in operative means, isshown-an internal combustion motor, having the usual shaft A, crank B,piston 0, cylinder D and connecting rod E connecting the piston O, andcrank B. The cylinder has a water jacket Forming a portion of crankamber 1 is a diaphragm 2, preferably of sprlng brass. It is mounted andclamped as tor example between two acking rings 3 which are secured inany well nown way to the wall portion of e crank chamber, as by pumpcasing 4, and bolts 5. A ump chamber 6 is formed between the diaphragm 2and pump casing 4,

the latter of which has two openings 7,,8,

therein; one 7, leading froman inlet valve chamber 9' into the pumpchamber '6; and

the other 8, leading from the pump chamber 6, into the outlet valvechamber 10,. An inlet valve'll controls an opening 12 leading from asource of water supply 13 while an outlet valve 14 controls the opening8 leading to the 111111) chamber 10, from which a \pi e 15 lea s, as to'the water'jacket F of the cy inder D. The construction of the valves,and their operations are so obvious from an inspection ofthe drawingsthat a description is omitted.

plain.

piston C, cause alternate rarefactions and compressions of theatmosphere in the crank chamber 1; consequently the diaphragm 2 moves toand fro, and assumes positions 16, and 17, which are exaggerated, forthe sake of clearness. When the diaphragm 2 moves to position 16, thereis a tendency to form a vacuum in the pump chamber 6; atmosphericpressure in the supply pipe 13 forces open t e inlet valve 11, and waterrushes into the inlet valve chamber 9, and the pump chamber 6 until euilibrium between the liquid on each side 0 the inlet valve 11 results;

the outlet valve 14 during the rarefaction in the pump chamber 1 alwaysclosing the out- I let opening 8. The moment the piston C begins todescend, the atmosphere in the crank chamber 1 becomes more compressed,and pushing outwardly against the diaphragm 2, tends to move it toposition 17. This pressure actingva-gainst the water in the pump chamber6, forces open the outlet valve 14, and the water. rushes into outletvalve chamber 10, and hence through the outlet pipe 15,

into the water jacket-F, until equilibrium is restored,between thepressure in the pump chamber 6 and-that in the outlet chamber 10; theinlet valve 11 of course; during the down stroke of the piston 0,closing the opening from the inlet valve chamber 9 to the source ofwater supply 13. In fine, the continuous alternate up and down strokesof the piston 0 cause in the crank chamber 1, alternate rarefactions andcompressions of the air in the crank chamber 1, and the diaphragmresponding to these changes and producing similar changes in the pumpchamber 6, causes valves 11, 14, to permit water to be drawn from thesource of supply and forced to'the lace where the water is desired.

A Whi e my inventionis extremely useful when it'is used in connectionwith an internal combustion motor, as for the purpose of cooling thecylinder of the motor, yet obvilet of the water jacket, and whennecessary, providing means to remove the heat of the water after leavingthe water jacket, one may have a continuous circulation through the pumpand the water jacket.

Further, y connecting the supply pipe with the out-' I have found myinvention very useful when applied to motors for driving boats,

but I do not wish to limit it to any particular use, for it'may becombined with all kinds of internal combustion motors, whatever be thepurpose for which they may be employed.

While my invention may be embodied in many forms, I do not wish to limitmy invention to the particular construction shown and described, butdesire to protect it in the broadestmanner legally possible.

What I claim is 1-- In an internal combustion motor, a casing having acrank chamber; a metallic diahragm'forming one side of said crankchamher, and closing and rendering said chamber air tight; a pump casingformed in one piece of metal, and, when combined with the diaer; meansfor securing said diaphragm and leading from the said pump casing tosaid crank chamber casing and forming thereby said air tight crankchamber and-said air tight pump chamber; said pump casing having formedtherein, an

inlet valve,chamber; an outlet valve chamber; openings leading from saidvalve chambers into said pump chamber; an inlet to said inlet valvechamber; and an outlet from said outlet valve chamber; an inlet valve tocontrol said inlet to said inlet valve chamber; and an outlet valve tocontrol the opening pump chamber to the outlet valve chamber.

In testimony whereof I afiix my signature in presence of two witnesses.GEORGE JOHN ALTHAM. Witnesssz' PHILIP E. TRIPP,

MARY R1 HOLT.

